Curiously, the Red Jacks and Purple Nines do not attack each other on the streets, and will even assist each other if one is wounded or in battle, pertaining to all gang member characters being modeled after Southside Hoods. To cover up the error in the plot, D-Ice warns Claude that if he shoots at Nines, some Red Jacks would assume they were under fire and shoot at him as well.

The favorite radio stations of the Southside Hoods are Game Radio, MSX FM, K-Jah and Rise FM in GTA III, but in GTA: LCS there's a glitch about favorite radio station of the Hoods, it depends by player stats "Most favorite radio station", they will listen the station you most hear.

No Purple Nines Glitch

In Grand Theft Auto III, there is a glitch involving the Purple Nines, usually on the PS2 and the PS3. When the player finishes Rumble and makes a new profile and goes to Wichita Gardens, the player will notice the Purple Nines have vanished. If the player starts the game all over again with the same memory card inserted, the player will then realize the Purple Nines are still gone, like because that you already finished Rumble and Rockstar forgot to make sure they appear in another file. Thus if the player tries to make more profiles, The Nines will still not spawn and the player will always fail the mission, and this can prevent the player from getting 100%. To fix this, try starting the game on a new memory card, or have backup saves, or try to do 100% and never re-start the game otherwise the glitch comes into effect. Another method is to start a new game without the memory card inserted, then re-insert the memory card and save your game. For the PS3, delete every file and once the player revisits the area, the Nines start spawning again.

In another Rockstar game, Manhunt 2, there is a gang called Red Kings. Since both games took place in the same universe, it could be the same gang as Red Jacks, which went bigger and took the new name after defeating their rivals. This seems unlikely however, as the Red Kings are of mixed races and the Red Jacks are strictly Afro-American.

The rival colors of the Red Jacks and the Purple Nines might be a reference to the Bloods and the Crips, street gangs from Los Angeles, which are also in New York (which Liberty City is based on), although only the color of the Bloods is represented in the game by the Red Jacks.